I'm curious, at about what mileage does one start to see things like outer tie rods, ball joints, motor & tranny mounts, shocks, etc.. start wearing out? I've got 60k on my 05', almost all highway. I'm just curious when to start thinking about replacing some normal wear n' tear stuff? I know these babies are built like super tanks, but at 6,005 lbs, I'd have to think that some of these parts start to show their age around this mark????